Nmap, squid, and squidGuard on 1.2.3

Anyone using these on their pfSense 1.2.3 machine? Do these work alright? Can they be "uninstalled" easily? (Note: I have no experience installing packages. I should probably commission a server as a development/test pfSense server.)

When I do an nmap on my IP on the LAN network (without checking any of the three boxes), it sits on the page pkg_edit.php just loading and loading.. with the text "Starting Nmap 4.76 ( http://nmap.org ) at 2010-12-27 16:28 CST" outside the right margins of the webdesign. After a while it just stops "loading" nothing.

EDIT: Ok finally, it took forever just to do a scan on my machine from the pfSense server.